22
Unit installation
SPLIT RACK AIR CONDITIONER USER MANUAL
UM.ICUBE2.0-SRAC.SG.0822 August 2022 www.eaton.com
If the connecting pipeline between indoor and outdoor units is more than 10m, it is necessary to add refrigerant
to the system to make the system operate normally. The amount of refrigerant replenishment for each increase
of 1m in the length of indoor and outdoor connecting tubes is shown in the table below. Units equipped with
cryogenic components need to refer to the installation instructions for cryogenic components.
Liquid tube diameter (mm)
Refrigerant addition per unit length
（
kg/m
）
6
0.009
9.52
0.04
12.7
0.1
ote:
N
As the optimal charge is affected by the operating conditions, the above is only for users’ reference, and the best
charge is based on the actual situation.
2.11 Electrical wiring
•
All electrical wiring shall be in accordance with local standards and check that the power supply is consistent
with the nameplate requirements.
•
In order to avoid corrosion and overheating at the terminal connection, all power supply lines are required to be
copper wires.
•
The specification of the power cord connected to the electric control box shall be selected according to the
maximum operating current on the nameplate. The total power supply must have a certain margin, and the
recommended value is more than 1.25 to 1.3 times of the unit parameters. The carrying capacity of the power
supply cable (wire) should be slightly larger than the maximum operating current of the unit, and the influence
of the working environment should be taken into account.
/ 1 3(
/ 1 3(
$ %
L+N+PE~220V
Customer distribution cabinet
Outdoor unit
Indoor unit
Main power supply
Outdoor unit
power supply
Outdoor unit
communication
Figure 2.20
Description for power supply terminal of unit
The indoor unit is equipped with power terminals as shown in the picture. XT1 is the main power supply of the
unit, XT2-L, N and PE are the outdoor power supply, and XT2-A+ and B- are the outdoor unit communication.
